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The World Space Observatory for Ultraviolet (WSO-UV) is an orbital opticaltelescope with a 1.7 m-diameter primary mirror currently under development. TheWSO-UV is aimed to operate in the 115-310 nm UV spectral range. Its two majorscience instruments are UV spectrographs and a UV imaging field camera withfilter wheels. The WSO-UV project is currently in the implementation phase,with a tentative launch date in 2023. Recently, two additional instrumentsdevoted to exoplanets have been proposed for WSO-UV, which are the focus ofthis paper. UVSPEX, a UV-Spectrograph for Exoplanets, aims to determine atomichydrogen and oxygen abundance in the exospheres of terrestrial exoplanets. Thespectral range is 115-130 nm which enables simultaneous measurement of hydrogenand oxygen emission intensities during an exoplanet transit. Study of exospheretransit photometric curves can help differentiate among different types ofrocky planets. The exospheric temperature of an Earth-like planet is muchhigher than that of a Venus-like planet, because of the low mixing ratio of thedominant coolant (CO2) in the upper atmosphere of the former, which causes alarge difference in transit depth at the oxygen emission line. Thus, whetherthe terrestrial exoplanet is Earth-like, Venus-like, or other can bedetermined. SCEDI, a Stellar Coronagraph for Exoplanet Direct Imaging is aimedto directly detect the starlight reflected from exoplanets orbiting theirparent stars or from the stellar vicinity including circumstellar discs, dust,and clumps. SCEDI will create an achromatic (optimized to 420-700 nm wavelengthrange), high-contrast stellocentric coronagraphic image of a circumstellarvicinity. The two instruments: UVSPEX and SCEDI, share common power and controlmodules. The present communication outlines the science goals of both proposedinstruments and explains some of their engineering features.

Stellar Imaging Coronagraph and Exoplanet Coronal Spectrometer: Two  Additional Instruments for Exoplanet Exploration Onboard The WSO-UV 1.7 Meter  Orbital Telescope